package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.common.vo.UserLoginVo;
import com.atguigu.common.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @Classname LoginController
 * @Description TODO
 * @Date 2024/7/10 22:03
 * @Created by 369502594
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转至一个页面
     *
     * SpringMVC viewController：将请求和页面映射过来
     * @return
     */

    @ResponseBody
    @PostMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone){

        //TODO 1、接口防刷


        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() -1 < 60 * 1000){
                // 60s不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        // 2、验证码的再次校验。redis。存key-phone，value-code sms:code；15297949758 -> 45678_1341414
//        String code = UUID.randomUUID().toString().substring(0, 5);
        String code = "";
        int len = 5;
        for (int i = 0; i < len; i++) {
            code = code + (int)(Math.random() * 10);
        }
        // 生成长度为5的随机数字验证码


        // redis缓存验证码，防止同一个phone在60s内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,code+"_"+System.currentTimeMillis(),10, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }


    /**
     * // TODO 重定向携带数据，利用session原理。将数据放在session中，
     * // 只要调到下一个页面取出这个数据以后，session里面的数据就会删掉
     *
     * // TODO 分布式下的session问题
     * RedirectAttributes redirectAttributes:模拟重定向携带数据
      * @param vo
     * @param result
     * @param model
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result,
                         RedirectAttributes redirectAttributes,
                         HttpSession session) {
        if (result.hasErrors()){
            // 校验出错，转发到注册页
//            result "reg";
            /**
             * .map(fieldError -> {
             *                 String field = fieldError.getField();
             *                 String defaultMessage = fieldError.getDefaultMessage();
             *                 erros.put(field,defaultMessage);
             *                 re
             *             })
             */
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            // Request method 'POST' not supported
            // 用户注册 -> regist[post] --> 转发到/reg.html (路径映射默认都是get方式访问的)
            return "redirect:http://auth.gulimall.com/reg.html";
        }
        // 真正注册。调用远程服务进行注册
        // 1、校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                // 删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                // 验证码通过 // 真正注册。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode()==0){
                    // 成功
                    return "redirect:http://auth.gulimall.com/login.html";
                }else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            }else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            // 校验出错，转发到注册页
            Map<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(attribute==null){
            //没登录
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }

    }
    @PostMapping("/login")
    public String login(UserLoginVo vo,RedirectAttributes redirectAttributes,HttpSession session) {
        R login = memberFeignService.login(vo);
        if (login.getCode()==0){
            // 成功
            // 1、登录成功以后，将登录的令牌存放在cookie中
            // 2、将用户信息存放在session中
            // 3、只要跳到下一个页面，这些数据都会消失
            // 4、只要跳到下一个页面，这些数据
            // 远程登录
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }

    }

//    @GetMapping("/login.html")
//    public String loginPage() {
//
//        return "login";
//    }
//
//    @GetMapping("/reg.html")
//    public String regPage() {
//
//        return "reg";
//    }
}
